Method of treating milk.



No. 648,798. Patented may '1, I900.

s. N. shuzmus. METHOD o|= TREATlNG MILK.

(Application filed Sept. 23,1899.)

(Np Model.)

UNITED ST TES PATENT OFF-ICE.

ERIK GUSTAF NICOLAUS SALENIUS, OF STORA-KRAF'FRIKET, SlVEDEN METHOD OFTREATING MILK.

SPECIFICATION forming part of Letters Patent No. 648,798, dated. May 1,1900.

- Ap lication filed September 23,1899. Serial-No. 731,472. (Nospecimens.)

To all whom it may concern.-

Beit known that I, ERIK GUSTAF NICOLAUS SALENIUS, engineer, a subject ofthe King of Sweden and Norway, and a resident of Stora- Kraftriket,Albano, in the Kingdom of Sweden, have invented certain new andusefulImprovements in Methods of Treating Milk, (for which I have filedapplication for patent in Sweden the 23d day of January, 1899,) of

which the following is a specification, reference being bad therein tothe accompanyin drawing.

The object of my invention is to effect the heating of milk, as forpasteurizing or sterilizing, and the separation of the milk into itsconstituent parts as one continuous series of operations and to use themilk beingtroated partially or wholly as the heating and cooling agent;and my invention consists in the process of treating milkhereinafterdescribed n a'r'fdclaimed'.

0 of a vessel D, which has another chamber E, that is occupied by warmmilk, the treatment of which is in the last stage. In this vessel thewarm milk which is about to lea ve the apparatus is cooled by the coldmilk, the

treatment of which is)" ust commencing. The

.- warmed milk is now conveyed by a pipe Etc the second vessel II.

a chamber or coil G of a second vessel' II, which vessel II,. like thefirst one, D, has a chamber or coil I, that is traversed by the hot milkreturning from its treatment in the heating apparatus. L. The enteringmilk is here still furtherheated, and the returning 'milk here receivesits first cooling. The milk to be treated now passes through a pipe K tothe heating apparatus L, after which opera-- tion it passes to anotherchamber or coil of The milk which has been heated reaches in the secondvessel II that temperature'at which the separation into its constituentparts can be most perfectly effected, and it is on. leaving this vesselconveyed by a pipe M to the churn, centrifugal creamer, or otherseparating apparatus N.

From the separating apparatus N the skimmilk passes to the receivingvessel 0 of the by the incoming milk to the desired temperature forpreservation.

It will be seen that by my proccsstthe in-- coming milk is graduallyheated, so as to require the application of but a limited amount of heatin the heating apparatusand that the heatimparted before reaching saidapparatus isderivcd from the outgoing milk, thus ctfecting an economy inthe heat necessary to be furnished in the treatment of the milk. It willalso be seen thatby my process the outgoing milk is gradually cooled andthat this cooling is done by the incoming milk, so as to obviate thenecessity of using the usual amount of cold water or ice to reduce itstemporature to a safe point for preservation.

, A most important advantage of my method is the interposition of thestep of separating the milk into its constituents at the point wheretheoutgoing millgcooled by the incoming milk, has reached that particulartemperature best suited for the separation operation. The milk is thussaved from a second heating to the desired temperature, and itsdclicately-constituted substance is thus saved the injury which resultsfrom repeated changes of temperature.

As the elements of my apparatus are of well-known construction, theyhave not been shown in detail.

Having thus described my invention, what I claim is?- The method oftreating milk which consists in forming an incoming stream of cold milk,heating the milk, conducting the heated milk along the incoming streamof milk so that the incoming stream is heated while the outgoing streamis cooled to the proper temperatn re for separation into its constituentparts,

separating the milk into its constituent parts,

while it is at such temperature, and, finally, conducting the parts ofseparated milk along the incoming stream of milk so that they are cooledand their heat is imparted to said incoming stream of milk,substantially as and for the purpose described. In witness whereof Ihave hereunto signed my name in the presence of two subscribingwitnesses.

- ERIK GU S'lAl NICOLAUS SALENIUS.

A. F. LUNDBORG,

J. F. A; RUTBA'CLY.

